One of the best policy moves that could be made is the prohibition of defined benefit pension plans - they are extremely attractive as voter bait for those who negotiate them (such as teachers and municipal employees), but are ultimately deceptive and dishonest since they depend on the fiscal viability of government unit in question (and we know how that’s working out).
Only defined contribution plans should be allowed.
However, that whole policy change would be discouraged by the example from the very top - Social Security - the ultimate unsustainable defined benefit plan (and perhaps the ultimate misnomer).
Other countries manage to maintain actual defined benefit pensions for retirees, some of which are fairly small countries with modest economies, Chile for instance. I’d assume they’re exercising fiduciary responsibility and do not permit gaming the system as is apparently so common with municipal and state pension systems.